2021 Annual Meeting

Presentation information

Oral presentation

V. Nuclear Fuel Cycle and Nuclear Materials » 503-1 Reactor Chemistry, Radiation Chemistry, Corrosion, Water Chemistry,Water Quality Control

[3G06-08] Behavior of Radioactive Nuclides & Fuel Debris 2

Fri. Mar 19, 2021 11:00 AM - 12:00 PM Room G (Zoom room 7)

Chair: Hidetoshi Karasawa (JAEA)

11:00 AM - 11:15 AM

[3G06] Study on revaporization of deposited CsI from stainless steel 304 surface in high-temperature steam atmosphere

*Muhammad Rizaal1, Shuhei Miwa1, Eriko Suzuki1, Jumpei Imoto1, Masahiko Osaka1, Mélany Gouëllo2 (1. Japan Atomic Energy Agency, 2. VTT Technical Research Centre of Finland)

Keywords:Cesium iodide, revaporization, high-temperature steam, Cs2CrO4

We experimentally investigated the revaporization behavior of deposited CsI on the surface of structural material such as stainless steel in a subsequent high-temperature steam flow (i.e., reflood of the reactor at severe accident). The experimental results showed that the deposited CsI at 850K could be vaporized, leaving the formation of Cs2CrO4 on that once-deposited surface and consequently giving an increase of iodine release observed below 400K.